<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        #app{
            text-align:  center;
        }
        .app2{
            width: 200px;
            height: 10px;
            margin: 0 auto;
        }

        .app3{
            height: 200px;
            position: relative;
        }

        .app3-1{
            width: 200px;
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
        }
        .app4{

        }
    </style>

</head>
<body>
<div id="app">
<div class="id1">
    <span>11</span>
</div>
</div>
<div class="app2">
1
</div>

<div class="app3">
    <div class="app3-1">
        11
    </div>
</div>

<div class="app4">
    <span>ssad</span>
    <span>dddd</span>
</div>
</body>
<script type="module" src="./dist/bundle.js"></script>
</html>